Initial Group aggro at warp-in. Spawn may aggro drones.
You may [Fleet] warp to preferred range distance.
Don't forget to loot the Reports needed to complete the mission.Warning: The spawn's six Shadow's Grunt Cruisers spawn at the beacon, deal a high amount of EM damage and is accompanied by web/ scramble Frigates.

Blitz

Eliminate the Mercenary Overlord battleship to trigger the spawn. Watch out for any incoming Mercenary Wingman Frigates that web/ scramble.
Eliminate Shadow. Loot the Reports dropped and warp out (any Reports sold by NPC Corps on the market may be used).

Tip

Start with the Grunt Cruisers to reduce incoming DPS from the spawn.
Watch out for any scrambling Frigates and shift your primary target accordingly.

Optional Approach

1) Warp in, align, kill the Overlord, instantly warp out before scramblers lock on, then warp back at 50- 100km, make sure you're outside of Cruiser's range. Then aggro and use a MWD to separate the frigates. Count on webbing if Frigates come too close! After this keep aligning of course.
2) Select "warp-to" distance between 50- 100km, kill all the initial ships and the Overlord last then pick off the spawn as they approach.
3) Tank the Overlord and snipe everything else, Micro Jump and snipe the Overlord and Spawn.